For example the keyboard may not be letting you type one keyOtterbox case: take off the rubber case, then take off the hard case flip it over to see what you have to push open
Then take the part with the screen protector (wash your hands if they are dirty) and wipe your hand over it to find dust or dirtRegular case: take the case off and get a cloth or wipe and wipe it until it's clean
:3 Hope this helped
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my book of complete randomness
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